Casinos vary in how they structure cashback, and each tends to use its own calculation method. The most common approach calculates the cashback base as the
difference between what you deposited and your balance at the end of the period, then
applies a percentage to that figure. The period is usually
weekly, every two weeks, or monthly — daily cashback calculations are less common, and tend to apply when the refund is based on total bets placed rather than net losses.
Some casinos instead only pay out cashback
once your balance actually hits zero. In this model, you keep playing as normal while you have a balance, and the cashback only kicks in as an incentive to keep playing after you've gone bust.
More complex calculation methods also exist — some subtract any deposit bonuses, promo codes, or no-deposit bonuses from the base amount before calculating cashback, and factor in total withdrawals as well. These formulas can also weigh your balance on a specific date, or apply additional eligibility criteria.
For example, a casino might only pay cashback if you've made at least 4 deposits in a month, reached a certain total betting volume, or met some other specific condition.